7W case-lessons are the main innovation in the world in 2018-2019. A lot of teachers, parents and students use them at school, or as homeschooling, or online.Case "The secrets of water"Scans: Science/Health/Psychology/Relax/ArtSense: While we are not thirsty, we do not even think about the importance of water in our lives. The human body is largely composed of water, but we rarely appreciate the aquatic environment as "own." What is the difference between the body of water in a glass of water, i